Power-transmitter.



No. 673,353. Patented Apr. 3'0, |901.

E. B. ALLEN.

Fowl-:n TRANSMITTER.

(Application led luly 24, 1900.)

(No lodai.)

Wfl/l l h UNITED STATES PATENT EETQE.

EDWARD B. ALLEN, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY, OF NET JERSEY.

POWER-TRANSIVI ITTER.

SPECIFICATION forming part of Letters Patent No. 673,353, dated April 30, 1901.

Application led July 24, 1900. Serial No. 24,680. (No modelli .To all whom, it may concern,.-

Be it known that I, EDWARD B. ALLEN, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New 5 Jersey, have invented cert-ain new and useful Improvements in Power-Transmitters, of which the following is a specification, reference being had therein to the accompanying drawings.

1o This invention relates to that class of power transmitters or start and stop motion devices by which a loose driving-pulley may be operatively connected with a driving-shaft by a suitable clutch device or may be disconnected I5 from said shaft when desired; and the object of the invention is to provide a power-transmitting or start and stop motion device of the class referred to in which the drivingpulley will have a strong clutch connection zo with the driving-shaft when the latter is to be rotated bysaid pulley and in which the clutch connection may be broken and the rotation of the driving-shaft quickly arrested without any sudden jar or shock.

z5 In the accompanying drawings, Figure l is a sectional elevation of a start and stop motion or power-transmitting device embodying the invention. Fig. 2 is a vertical section of the start and stop motion or clutch- 3o controlling lever. Fig. 3 is a detail face view of the stopping-disk attached to the drivingshaft. Fig. 4 is a detail face view of the clutch-disk loose on the driving-shaft. Fig. 5 is a detail view to show the relative posi- 35 tions of the two disks when the driving-pulley is clutched to the driving-shaft. Fig. 6 is a sectional View illustrating a slightly-modified form of the clutching device.

Referring to the drawings, A denotes a por- 4o tion of the frame of a machine to which the power-transmitting device is to be applied, and B denotes the driving-shaft of said machine, said driving-shaft, as herein shown,

mounted on a reduced portion of the shaft B is a sleeve e, provided with a flange or disk portion e', having a tappet e2. The shaft B is provided at its end with a suitable stop or 55 abutment, herein shown as a hand-wheel F, which, a's represented in Fig. l, is screwed against a shoulder formed on the shaft B and rigidly held in place by a set-nut b, while in the construction shown in Fig. 6 said hand- 6o. wheel is fixed to the threaded port-ion b2 of the shaft B/by a transverse pin f. Loosely mounted` on the sleeve e is a driving-pulley E', the hub of which is inclosed between the flange or disk portion e' of the sleeve e on one 65 side and the stop or abutment afforded by the hub of the hand-wheel F on the other side, so that when the disk e is moved toward said hand-Wheel the hublof the said driving-pulley will be clamped between the said disk c' 7o and the hub of said pulley.

In the construction shown in Figs. l, 3, and 4 the stopping-disk d, fixed to the shaft B, is provided adjacent to said shaft with facecam projections di, and the disk e' is provided 75 with similar face-cams c4, adjacent to and facing the cams d4 of the disk d. Both of said disks are recessed on theiradjacent faces for the reception of a torsional spring g, one end of which is connected to the disk d and the 8o other end of which is connected to the disk e', so as to have a tendency to turn said disk e and the sleeve e in the direction denoted by the arrow in Fig. 5. This turning movement of the sleeve e and its flange e' by the 85 said spring, when not resisted, causes the face-cams d4 and e4 to ride up on each other, and thus the disk c/ will be forced away from the disk d and toward the hand-Wheel F, so as to clamp the hub of the driving-pulley E 9o between the said disk e' and the hub of the said hand-wheel, thereby causing the said driving-pulley to be locked or clutched to the driving-shaft to rotate said shaft.

The start and stop motion or clutch-con- 95 trolling lever C is formed hollow, and mounted therein is a sliding rod or plunger c', provided at its lower end with a stopping-inger c2, said sliding rod or plunger being pressed downward by a coil-spring c3, held between a shoulder on the lower part of said plunger and a regulating-screw c4, tapped in the upper portion of said lever, and by which screw the stress of said spring may be regulated or adjusted. The sliding rodor plunger c' isv prevented from turning by a screw o5, attach-ed to said sliding rod or plunger and` received in a slot c6 in the lever C, and which slot admits of a vertical or longitudinal movement of said 1o in which position the driving-pulley is unclutched from the driving-shaft) by a coilspring h, connected with said lever and with the frame A, and said lever is moved to the position shown in dotted lines in Fig. l to allow the torsional spring g to eect the clutchj ing connection of the driving-pulley with the driving-shaft by means of a push-bar t', at-

tached to-said lever, and which may be operated either manually or automatically to efzo feet the clutching operation and set the driving-shaft in motion.

In the slightly-modified form of the invention shown in Fig. 6 the face-cams d4 and e4 are omitted, and the shaft B is provided with a threaded portion b2, and the sleeve e is s'imilarly threaded, so that a turning movement of the said sleeve by the torsional spring g ,will cause an endwise movement of the said sleeve and its flange or disk c similar to that 3o produced by the cams d4 and e4 to clamp the hub of the driving-pulley E between said disk e and the hub of the hand-wheel F.

vnection of the driving-pulley E with the shaft B is effected by moving the clutch-controlling lever to the position denoted by dotted lines in Fig. l and in which position the iinger c2 at the lower end ofthe sliding rod or plunger 0' is swung `away from the tappet e2 4o on the disk e and Aout of the notch cl2 of the disk d into a recess a2, formed for its reception in the frame A or the bushing a. As soon as the finger c2 is disengaged from the tappet e2 the torsional springg acts to turn the sleeve e and its 'flange or disk e in the direction denoted by the arrow in Fig. 5, and/thus cause the hub of the driving-pulley to v`be clamped between said iiange or disk e and the hub of the driven pulley, while the re- 5o moval of the finger c2 from the notch of the disk d leaves the said disk and the shaft B, to which it is attached, free to rotate. When the machine is to be stopped, the bar z' is released, and the spring h instantly causes the clutch-controlling lever C to assume the p01 6c cam portion d of thesaid disk until the notch d2 thereof comes into register with the said nger or projection, when the latter instantly snaps into said notch by the action of the coil-spring cacting on the sliding rod or plunger c, by which the said finger c2 is carried.

As the saidfinger c2 rides up the cam d/ its pressure thereon, owing to the stress of the spring c3, causes the said finger to act as a brake to retard the motion of the driving p shaft, and the pressure of the spring c3 may beso regulated by the screw c4 that by the time the notch d2 comes opposite the said finger c2 the rotation of the shaft and the disk d, attached thereto, will be nearly arrested, so that when the stop projection d3 on the said disk 4comes in contact with said linger Y there will be little or no shock at said contact, as .the pressure of said spring on the plunger c' may be so regulated, according to the speed at which the shaft may ordinarily be running, as merely to allow the said finger c2 to ride up the said cam portion b and bring before the machine stops, the brake action of the finger c2 resulting fromthe pressure of the spring c3 being sufficient, with aproper adjustment of the screw c4, to just about stop the rotation of the drivinU-sha'ftas the notch d2 comes into register with stoppingiinger c2. When the clutch-lever'is moved to theposition shown in full lines in Fig. l, the finger c2 comes into the path of movement of the tappet e2 on the disk or flange' ci, so that when said tappet strikes said finger the said disk or flange and the sleeve e will be turned backward in the direction opposite that denoted by the arrow in Fig. 5 to'unclutc'h or release the driving-wheel, and as the` contact of the said tappet with the said stopping-finger c2 is In the use of the invention the clutch confl cushioned by the torsional spring g no sudden jar or shock will be produced by this'u'nclutching operation. I

A comparatively light torsional spring g may be employed to effect the clutching operation, owing to the fact that the drivingpulley E will be rotated in the direction denoted by the arrow in Fig. 5' or in the direction in which the clutch flange or disk and its sleeve are turned to effect the clutching operation, so that as soon as the initial clutching operation is eected the rotation of the. driving-pulley will have a tendency to increase the clutching action, and thereby cause the said driving-pulley to be securely gripped by the clutching parts, and thus be strongly connected With the driving-shaft. The stress y of the torsional spring g may be regulated or varied by inserting one end thereof in any one of the holes d5 in the fixed disk d.

Having thus described my invention, I claim and desire to secure by Letters Patent- Y l. In a clutch power-transmitting device, the combination with a driving-shaft, of a fixed abutment on said shaft, a disk or abut ment loose on said shaft but adapted to rotate therewith, a loose vdriving-pulley the hub of which is mounted between said fixed abutment and said loose disk or abutment so as through the said liXed abutment to be connected with said shaft when the latter is to be rotated, means for turning said loose disk or abutment and means for moving said loose the notch d2 into register with the said finger to be clamped between said abutment/s and4 IOC IIO

disk or abutment endwise of said shaft, as it of said shaft, as it is turned, to clutch or unclutch said driving-pulley, a clutch-controlling lever provided with a spring-pressed brake device, and a cam, fixed to said shaft, againstwhich said brake device presses.

3. In a clutch power-transmitting device, the combination with a driving-shaft provided with a fixed stop or abutment, as hand-wheel F, and with a fixed disk having a cam portion and a notch, of a disk loosely mounted ou said shaft and having a tappet, a torsional spring connecting said disks, a driving-pulleyloose relative to said shaft and the hub of which is inclosed between said loose disk and said fixed stop or abutment, means for effecting a movement, endwise of said shaft, of said loose disk when the latter is turned by the said torsional spring, and a clutch-controlling lever provided with a spring-pressed plunger having a finger to engage said tappet and to ride up the cam portion of said fixed disk and enter the notch with which the latter is provided.

4. In a clutch power-transmitting device, the combination with a driving-shaft provided with a fixed stop or abutment, as hand-Wheel F, and with a fixed disk having a cam portion and a notch, of a disk loosely mounted on said shaft and having a tappet and a sleeve, a torsional spring connecting said disks, a driving-pulley loosely mounted on said sleeve and the hub of which is inclosed between said loose disk and said fixed stop or abutment, means for effecting a movement, endwise of said shaft, of said loose disk when the latter is turned by the said torsional spring, and a clutch controlling lever provided with a spring-pressed plunger having a finger to engage said tappet and to ride up the cam portion of said fixed disk and enter the notch with which the latter is provided.

5. In a clutch power-transmitting device,

the combination with a dri ving-shaft provided.

with a fixed stop or abutment, as hand-wheel F, and with a fixed disk having a cam portion and a notch, of a disk loosely mounted on said shaft and having a tappet and a sleeve, a torsional spring connecting said disks, a driving-pulley loosely mounted on said sleeve between said loose disk and said fixed stop or abutment, means for effecting movement,

endwise of said shaft, of said loose disk when the latter is turned by said torsional spring, a clutch-controlling lever provided with a spring-pressed plunger having a nger to engage said tappet and to ride up the cam portion of said fixed disk and enter the notch with which the latter is provided, and means for varying the pressure of said finger against the cam portion of said fixed disk.

6. In a clutch power-transmitting device, the combination with a driving-shaft provided with a fixed stop or abutment, as hand-wheel F, and with a fixed disk having a cam portion and a notch, of a disk loosely mounted on said shaft and having a tappet and a sleeve, a torsional spring connecting said disks, a driving-pulley loosely mounted on said sleeve between said loose disk and said fixed stop or abutment, contiguous face-cams on said disks for effecting a movement, endwise of said shaft, of said loose disk when the latter is turned by said torsional spring, a clutchcontrolling lever provided with a springpressed plunger having a finger to engage said tappet and to ride up the cam portion of said fixed disk and enter the notch with which the latter is provided, and means for varying the pressure of said finger against the cam portion of said fixed disk.

In testimony whereof I affix my signature in the presence 0f two witnesses.

EDWARD B. ALLEN.

Witnesses:

HENRY OALVER, HENRY J. MILLER. 

